Gas-furnace.



P. A. J. GOUSIN.

GAS FURNACE.

APPLICATION FILED JAN. '1, 191a.

Patented Sept-9, 1913.

9 SHEETS-SHEET 1 P. A, J. GOUSIN.

GAS FURNACE. APPLICATION FILED JAN. 7, 1913'.

Patented Sept. 9, 1913.

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P. A. J. GOUSIN,

GAS FURNACE.

APPLIOATION FILED JAN. 7, 1913 9 SHEETS-SHEET 3.

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P. A. J. GOUSIN.

GAS- FURNAGE.

APPLICATION FILED'JAN. 7, 1913.

1,072,578. I Patented Sept. 9, 1913.

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P. A. J. GOUSIN.

GAS FURNACE.

APPLICATION FILED JANJ, 1913.

Patented Sept. 9, 1913.

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APPLICATION FILED JAN. 7, 1913.

1,072,578. Patented Sept. 9, 1913.

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GAS FURNACE.

APPLIOATION FILED JAN. 7, 191a.

Patented Sept. 9,1913.

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GAS FURNACE, APPLIOATION FILED JAN. 1, 191a.

Patented Sept. 9,1913.

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PAUL AGI-II'LLE JOSEPH COUSIN, 0F LOOS-LEZ-LILLE, NORD, FRANCE.

GAS-FURNACE.

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' Application filed January 7, 1913.

T 0 all whom it may concern I Be it known that I, PAUL ACHILLE JosnrrrCousin, citizen of the Republic of France, residing at 8 1 RueFaidherbe, LooslCZLlllG, Nord, in the Republic of France, have inventednew and'useful Improvements in GasFurnaces, of which the following is aspecification.

My invention relates to improvements in gas furnaces used for meltingmetals or other purposes.

One object of my invention is to provide a reducing burner formed of twovertical flues, one for the gas, located near the furnace chamber andthe other for air, which are separated by a wall terminating on a levelmuch below the point where the flues run into the furnace chamber, sothat a combustion and expansion chamber is thus formed for the flame,which chamber is located below the point of introduction of the flameinto the heating chamber of the furnace. By this arrangement, I am ableto obtain the exact length of flame desired, to bring the part of saidflame where the temperature is at its maximum to the part of the furnacechamber most convenient according to the requirements, and to insurethat an excess of gas shall come into contact with the material to betreated, which aid in the reducing effect.

Another object of my invention is to com-.

bine in a furnacea reducing burner of that kind, arrangedat one endofthe furnace chamber with oxidizing burners arranged at both sides ofsaid chamber. By this arrangement, the flames of the oxidizing burnersare directed in the furnace chamber in a direction at right angles tothe reducing flame, whereby the two fluids, gas and air, of said flameare thoroughly mixed and the combustion thereof is improved. Moreover,it is thus possible to effect in the same furnace either operationswhich require an oxidizing atmosphere at certain times and a reducing orneutral atmosphere at other times, or operations which only require anoxidizing, reducing or neutral atmosphere, respectively, and to, obtainin all cases the temperature desired with the best conditions for aperfect combustion. I

In the annexed drawings: Figure 1 is a longitudinal section along theline 11, Fig. 2 of a furnace with lateral. oxidizing burners and areducing burner located at one end of the furnace. Fig. 2 is "ahorizontal Specification of Letters Patent.

Patented Sept. 9, 1913.

Serial No. 740,669. I

sectional View substantially on the line 22, of Fig. 1; Fig. 3 isa-similar view substantially on the line 33 of Fig. 1; Fig. 1 is a.vertical sectional view substantially on the line 41 of Fig. 1; Fig. 5is a similar view substantially on the line 55 of Fig. 1; Fig. 6 is asimilar view substantially on the line 6+6 of Fig. 1; Fig. 7 is asimilar view substantially on the line 7 7 of Fig. 1; Fig. 8 is asimilar viewsubstantiallyon the line 88 of Fig. 1; Fig. 9 is a similarview substantially on the line 99 of Fig. 1; Fig. 10 is a similar Viewsubstantially on the line 10-10 of Figsy2, 3, 5 and 9; Fig. 11 1s averticalsectional view, substantially on the line 1111 of Fig. 12 of amodified 'form of invention embodying a rotary furnace having acylindrical furnace chamber; Fig. 12 1s a similar View substantially onthe line 12, 12 of Figs. 11 and 13; Fig. 13

is'a horizontal sectional view substantially on the line 13-13 of Fig.12. s

The furnace shown inFigs. 1 to 13 has a heating chamber a in which thematerial to be treated is placed either in bulk or in furnace chamber aand provided with a chamber q into which gas and air are ledrespectively by parallel vertical flues r. s (Fig. 2) separated fromeachother by a vertical transverse wall 6, the gas flue 1* being nearerthe furnace chamber a. The burner chamber 9 forms with the furnacechamber a a continuous chamber having in its wall no projecting orabrupt parts adapted to form eddies, so that from the ends of thevertical flues r s, to the smoke exhaust fines 0 both currents of fluid,air and gas, remain parallel, the combustion being effected graduallyalong the way of the gases. As the gas is led under the air, an excessof gas ioo is kept in contact with the material treated,

whereby the reducing effect is aided. The gas isled to the flue r by ahorizontal flue f (Fig. 2) from a flue cl through a regulating valve C.The air is led to the flue s by a similar flue g froma flue cthrough aregulating valveD. Each of the fines r s is lhenumber of divided intotwo conduits by vertical longi-. tudinalpartition: u in thegas flue r,and o.

a mixing chamber q is formed in-which'the flames can expand. A damper 'E(Fig. 1) is provided preferably in the=back wall of the furnace forregulating the action of the reducing burner.

The furnace is also provided with oxidizing burners arranged at'bothsides of the chamber a and shown as being five in number on each ,side.Each of said burners comp *ises a horizontal flue 0 which opens:intothe. chamber a and is fed with gas and air by moans'oftwo vertical.parallel lines F -G respectively, said flues being in'ithe sainctransverseplane of the furnace. The current of air is thus deflected atright angles in its passage from'the flue G to the flue 0 so.that thetwo currentsof air and gas flow in perpendicular directions at the pointwhere they meet, where ignition occurs. Anexcess of air is necessary forobtaining an oxidizing action. The flames thus obtained are short andvery hot; they are directed transversely through the furnace chamber a.if the burners 0 are placed suflieiently near to each other,the flamesthereof meeteach other vin the direction of the length of the furnaceand are mixed and stirredtogether which aids inobtaining a rapid andcomplete combustion. Dampers H (Fig. permit of regulatingeach oftheoxidizing burners separately.

The gas flues F (Fig. 10 .are in communication at the bottom withhorizontal flues F connected by vertical flues F with lower longitudinalhorizontal flues jto which air is fed from the flues (Z through .valvesh. The air flucs G are in communication by flues G similar to F andvertical flues G similar toF .with longitudinal horizontal flues i towhich air is fed from the flue 6 through valves is. d

The gas may betaken directly from the gas producer or other convenientsource or heated in a regenerator; it is led :by a flue (Z (Figs. 1, 2)to the transverse flue (Z carrying'the valve C and both valves it. Theheated air coming from the regenerator is led to the valve carrying fluee by a similar flue 6 (Figs. 1, 2). The regenerators maybe arrangedunder the furnace and serve as a foundation for the same. The smokeescapes through thelateral.openingso (Fig. 4L) and the two verticalfines p which communicate 'by means of transverse horizontal flues Kwith a longitudinal horizontal flue L (Fig. 2) wherethe smoke iscollected and led into a flue hl'leading to the stack not shown. Atthepoint where-both flues K run into the longitudinal flue L, the latteris provided with a vertical longitudinal partition N by which directcommunication between the fines K is prevented and the draft made moreunifornron both sides of the furnace whatever the location ofthe-stackmay be. Two dampers P (Fig. 4) are provided in the vertical flues p onboth sides ofthe'furnace. It is thus possible to reduce at will thesection of passage of the smoke through said flues and to entirely out.off the'furnace from the stack when the furnace is stopped, as

shown in Fig. 4.

lVhen the furnace is used :for melting metals and isnot-wor-kedcontinuously, the combination of the reducing and oxidizing burners hasspecial advantages as the beginning of-anoperation is difflcult becausethe furnace chamber is given opportunityto cool-between operations; theoxidizing burners, either-alone or in combination with-the reducingburner permit the furnace to be then heated rapidly while the reducingburner is only keptworking in normal conditions and particularly at theend of the melting operation when :any oxidation which would bedetrimental to the quality of the metal obtained must be avoided. Whenthe :furnace is operated without interruption, the oxidizing burners maybe omitted. 1

Referring to the modified form of inven- :tionillustrated in Figs. '11.to 13, at designates the cylindrical furnace chamber to which the airand gas pass from=thechan ber .9 said chamberibeing provided with thetapping opening at The air and gas pass to the chamber 9 from the flues3 and 1" respectively, which communicate with the horizontal e'fluesgand f respecstively. A is alblock orplate removably inserted in the backwall of the furnace to permit access to thelinterior, for purposes ofrepair and the ilike, and B designates a suitable manhole formed .in theback wall of the furnace. %E designates a damper adjacent the :reducingburner for regulating the actionthereo'f; 'P designates an addi- .tionaldamper in verticalflues 79 leading to the smoke escape flues 0 and Kdesignates a' transverse horizontal smoke escape flue in the base of thefurnace. The operationofthe modified form of-the invention issubstantially :the same as that-of the preferred form and requires noadditional de scription.

Having nowdescribedmy invention, What 130 ;I claim as new and desire tosecure by Letters Patent is 1. Ina furnace incombination, aheatingchamber, two parallel vertical flues,

7 at its upper end with the heating chamber,

substantially as described and for the purpose set forth.

2. In a furnace in combination: a heating chamber, parallel verticalflues in communication with one end of the heating chamber, means forleading a combustible gas to one of said flues, means for leading air toanother of said flues, vertical flues. arranged at the sides of theheating chamber, said flues being arranged in pairs in transverseplanes, a horizontal flue connecting both flues in each pair at theupper end and opening into the heating chamber and means for supplyingair to one of the flues in each pair and a combustible gas to the otherflue, substantially as described and for the purpose set forth. I

3. In a furnace, in combination: a heating chamber, parallel verticalflues located at one end of the heating chamber, means for leading acombustible gas to one of said flues, means for leading air to anotherof said flues, an expansion chamber into which the said flues open atone end and in communication at the other end with the heating chamber,vertical flues arranged at the sides of the heating chamber, said fluesbeing arranged in pairs in transverse planes,

a horizontal flue connecting both flues in each pair at the upper endand opening into the heating chamber and means for supplying air to oneof the flues in each pair and a combustible gas to the other flue,substantially as described and for the purpose set forth.

4-. In a furnace in combination: a heating chamber, two parallelvertical flues located at one end of the heating chamber one of saidflues being immediately adjacent said chamber, means for leading acombustible gas to the vertical flue adjacent the heating a chamber,means for leading air to the other vertical flue, an expansion chamberinto which the said flues open at one end and in communication at theother end with the heating chamber, vertical flues arranged at the sidesof the heating chamber, said flues being arranged in pairs in transverseplanes, a horizontal flue connecting both flues, in each pair at theupper end and opening into the heating chamber, means for supplying airto one of the flues in each pair and PAUL AGHILLE JOSEPH COUSIN.

Vitnesses:

PH DE BEIR, RENE DUBAR.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

